A Vehicle Mass Estimation Method Considering Shifting Factors

A technology of vehicle quality and quality estimation, which is applied in the field of vehicle quality estimation considering gear shifting factors, and can solve problems such as reducing the accuracy of vehicle quality estimation, affecting vehicle quality estimation results, and increasing vehicle production costs
CN106740870BActive Publication Date: 2019-10-08重庆科知源科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
重庆科知源科技有限公司
Publication Date
2019-10-08

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Abstract

The invention discloses a vehicle mass estimating method considering the gear-shifting factor. Firstly, vehicle driving state data are collected and calculated, and parameters needed for a model are obtained; then, the mechanical property in the vehicle driving process is combined to build a vehicle longitudinal dynamics model; a weighting least square recurrence mass estimating model with multiple forgetting factors is built; and the using condition of a vehicle mass real-time estimating system is determined, collected vehicle driving state data and relevant model parameters are input into the vehicle mass real-time estimating system, and the real-time vehicle mass is estimated and output. According to the vehicle mass estimating method considering the gear-shifting factor, a relatively accurate mass estimating result is obtained before and after gear shifting of the vehicle. Meanwhile, in consideration of the sudden change of the transmission ratio at the time of gear shifting and the change of a vehicle rotating mass conversion coefficient after gear shifting, a weighting least square recurrence estimating method with the multiple forgetting factors is adopted, and real-time estimating of the vehicle mass is achieved.
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Description

technical field

[0001] The invention relates to the technical field of real-time estimation of vehicle mass, in particular to a vehicle mass estimation method considering gear shifting factors. Background technique

[0002] Real-time estimation of vehicle dynamics model parameters is the basis of vehicle control, and vehicle mass parameters are important parameters in vehicle dynamics models. Accurate and real-time vehicle mass estimation parameters can effectively improve the performance of vehicle electronic control systems, such as electronic stability control systems (ESP) relies on vehicle quality parameters to calculate the side slip angle and yaw angle of the center of mass in real time, so as to realize the control of the lateral slip of the vehicle. At the same time, studies have shown that adjusting the shift schedule according to real-time changes in quality parameters can save fuel by about 2.62%-4.86%. Therefore, accurate estimation of vehicle mass parameters i...

Claims

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